– How can humidity in the air be measured as a percentage? How much humidity is 100%?
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To add to all the explanations, a measure of absolute humidity is the dew point, which is the temperature the air would need to be cooled to in order to be completely saturated, since colder air can hold less moisture. The closer the dew point is to the air temperature the more saturated the air is, and the more relative humidity you have. A relative humidity level of 100% means the dew point is equal to the air temperature, thus the air can’t hold more moisture.
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